Bulk Senders Guidelines
Troubleshoot delivery issues with Postmaster ToolsGmail Postmaster Tools provides senders with metrics on parameters such as reputation, spam rate, feedback loop, etc. It can help you check compliance to the Gmail bulk sender guidelines, as well as identify issues that can cause trouble with the spam filter.
We’ve received inquiries from bulk senders who’d like more information on best practices to ensure that their mail is delivered to Gmail users. Gmail classifies incoming mail in the following ways:
- Spam vs. non-spam: Spam messages are placed in the spam folder, while non-spam message are placed in the inbox.
- Mail categories: Most users use Gmail’s default inbox which further classifies non-spam mail into categories – Primary, Social, Promotions, Updates and Forums. Primary, Social and Promotions are enabled by default, but users can choose to enable or disable from all five to none. The Primary category includes person-to-person conversations and message categories that aren’t currently enabled.
Mail classifications depend heavily on reports from users. Gmail users can mark and unmark messages as spam, and can move non-spam messages between inbox tabs. In both cases Gmail learns from user corrections and over time automatically adjusts the classification to match users’ preferences.
The following guidelines can help you achieve predictable classification and receiver satisfaction.
- Open Gmail.
- Open an email.
- Below the sender’s name, click the Down arrow .
The message is authenticated if you see:
- “Mailed by” header with the domain name, like google.com.
- “Signed by” header with the sending domain.
The message isn’t authenticated if you see a question mark next to the sender’s name. If you see this, be careful about replying or downloading any attachments.